Beating-engine and extracting apparatus for making cellulose.



B. LOOMIS.

APPLICATION. FILED NOV. 27,.1912.

- Patented Aug. 25, 1914 2 BHEET BSHEET 1.

v BEATING ENGINE AND EXTRAGTING APPARATUS FOR. MAKING GELLULOS B.

' INVENTOR g [gel/ Home i W! TJNE SSES B. LO0MI$. BEATING ENGINE AND EXTRACTING APPARATUS FOR MAKING OELLULOSE.

APPLICATION IILED NOV. 27, 1912. 1,108,593.

Patented Aug. 25, 1914 2 SHEETS-SHBET 2.

Q l WITNESSES K/QWW,

A [form incense.

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BURDETT LOOMIS, or HARTFORD, CONNECTICUT, ASSIGNOR 1 means UTILIZATION COMPANY, OF EAST ORANGE, NE-VJ JERSEY, .A. CORPORATION OF NEXV' JERSEY.

BEATING-EN GIN'E EX TRA CTIN G APPARATUS FOE-MAKING CELLULOSE.

Specification of Letters Patent.

Patented Aug. 25, rate.

Application filed November 27, 1912. Serial No. 733,808.

ing woody material and plants to make cel lulose. and preparing finished paper stock ,directly in the engine; also for saving extrot-ted natural constituents. such as tannic acid. fatty acids, volatile and other, oils, gums and resins, and re-using fattyacids and other solvents in asubsequent operation.

The principal object of my invention is .to provide an improvedconstruction of beating engine. in which woodyand other fibrous material may be reduced to pulp or cellulose under pressure, and in which the material may be caused to circulate while subjected to the action of a beating drum and blades till a washed, clean and bleached cellulose is prepared ready for paper making. I

Another objectis to provide special means in a closed. digester and beating enginel for causing a forced circulation of ex-.

- crating and storing-watery extracts, such as tracting and dissolving liquor and fibrous material or pulp. whereby every part of the fibrous material may be repeatedly subjected to the action 'of the 'beating drum and blades, and the mass of material agitated "t'cr facilitating the extraction and removal of oils, gums and resinousmatterl Another objectis to provide an apparatus, including a closed beating engine and extractor for circulating hot water or solvent liquor, reheating such water or liquor, septa-nnic and other acids, volatile and other oils, and re'sin'ousand gum-my matterfrom wotrd and plants; whereby great economy may be effected and improved products obtained,

Different kinds of wood and plants centain a variety of constitfients, such as tan 1110. {1Ild other acids. gums, wax, turpenes,

oilsand resincus substances, according'to the character or kind of wood or lant," which substances are not useful or deslrable in cellulose for making paper, and are, in

fact, detrimental thereto,but which, if separated from the wood and from one another, are quite valuable for use in the arts, and which when separated, leave the fiber of wood or plants in the cleanest and'best condition for making superior pulp or cellulose. with a reduced expenditure of time and labor and areduced percentum of chemicals, heretofore required for that purpose.

My apparatus is especially adapted for extracting and separating the various use ful constituents and utilizing them as far as possible in making cellulose.

The matter constituting my invention will he defined in the claims.

I will now describe my apparatus by reference to the accompanying drawings, .in which Figure 1, represents a sectional elevation of a closed beating engine, and extractor constructed in accordance with my. invention. Fig. 2, represents asectional elevation of a beating engine and connecting apparatus for vseparating and collecting extracted liquor, aw-gas heater and connections, and other devices for collecting and saving useful products.

-In the apparatus I provide'seven principal parts or devices consisting of abeating engine and extractor 1, an. expansion and depositing chamber 3030 heating coils 36 located in a furnacebelow the bottom of engine 1, a condenser 32, a gas heatlng coil -14 in a furnace, a gas force pump 62, and a.

disintegrator tank 58, these .parts being suitably connected by valved pipes, and a, circulating force pump being connected in the system.

The closedcirculati-ng and beating engine 1, may be constructed of cast iron or other suitable metal, and has four principal body portions, consisting of the lowertransverse horizontal body 2-2", end connections 3-49,

an upper inclined Conveyer pipe or trunk 4,

and upright end 5, suitably Connected together to form a circulating chamber for iiber-materi al'and treating liquor or water. To one end of the drum-chamber 2 is connected aT 2, having an opening-and a 7 cover plate a. for permitting inspection, or for other desired purpose. To the other end of chamber 2 is connected at corner T 3, having material, a reheater for solvent 80 a blow ofii' or discharge-pipe 3. To this 'T is connected an upper cross 4 which in turn is connected to the inclined transverse conveyer pipe or trunk 4. These castings are bolted together at their flanges. The cross casting 1* has a top opening which is closed by a cover plate r, also an outer end opening which is closed by the thrust plate l,'

\ having a socket 15, containing a thrust col:

circular groove for receiving the cover 7 x which is provided with a circular rib to make a tight joint with. said groove. The cover will be secured in place by bolts?" and s provided with a screw-eye 7 T-he cast- 1g6 is provided with a circular shoulder 6".within the mouthpiece 6, for supporting a perforated screen plate or sieve 10. To the cover is secured a pipe or rod 9, having a flange at its lower end, to which is connected the plate 10, so that the said plate may be, removed with the cover. The mouthplece is provided with a discharge pipe connection .8, connecting with a discharge pipe 8, which connects with the expansion and depositing chamber and is provided with a valve 6. I

In the pipe or trunk 4 is placed a screw conveyer 12,- having a shaft 13 resting at its lower end in the socket 15, and passing at its upper end through a stufling box and plate .14. In-practice a belt wheel or any suitable gear wheel will be secured to shaft 13' for turning the screw-conveyer.

' The corner casting 5 is provided with a p pe connection 16 for the return circulating pipe 39 leading from the top of the heating co l. W1th in the casting 5 is extended an in ecting pipe-17, as a continuation of the I return pipe 39. This serves as one of the means forcausing a forced circulation through the beating engine.

In the chamber 2 is mounted a beating 'drum 18 on a shaft 19 in a journal box 20 in a well known manner. Below the drum,.

} in a-suitablcasing is placed an adjustable bed plate 21, having the usual knives or blades;- and made adjustable toward or from the drum by special adjusting m echanism 22 in a casing 23. A clean-out door 24 is provided in the lower part of the drumchamber. .The upper wall of the drum chamber issuitably curved; to conform approximately tothecurve of the drum, but so as to approach it closer at the upper corner 2 of the chamber. Thedrum will revolve in the direction of the arrows. The opening between the upper wall and the vided below the arch 37*.

drum is flaring from the narrow slit 2 to the wide opening 2 The construction of the upper wall serves to prevent most of the fiber material from circulating around with the drum. To the mouthpiece (3? is connected a water and vapor discharge pipe 8, having a valve Z), which connects with an expansion and depositing chamber, 3030, at the top of which connects a vapor discharge pipe 31, having a valve 0, leading to a condenser 32. The expansion and depositing chamber 3() 30 is of a suitable height and diameter to provide for expansion of the vapors and partial cooling of the liquor to facilitate deposit of resinous or gummy material. At

the lower end the chamber is made with tapering walls terminating with a discharge pipe having a valve g for drawing ofi' gummy or resinous matter.

A steam coil 38 is placed in the lower end of the depositing chamber for melting gummy v or resinous material in case it becomes cold and hardened. At-about the middle height of chamber 3030" is placed a separating dome or hood 33 which may be attached at its edges to the wall of the chamber, as

shown in Fig. 2. In this construction the outlet pipe 34 connects with the wall of chamber 30 at the top of the dome and is provided with a valve .0. The dome 33 is located below the connection of the water and vapor discharge pipe 8 from the engine and extractor 1 and provides a vapor expansion chamber or space 30 above it, and a depositlng or catc'h-all chamber or space 30* below it. This dome acts as a deflector and separator uca-use the rosin or gummy matter to be deposited in the bottom. of the chamber while the water or treating liquor flows up into the dome and thence off to the circulating pump 35. A positively acting rotary pressure pump is preferably used, though some OlllGIflklllCl of positive pressure pump may be employed. A discharge pipe 3 conuects with the pump and leads to the lower end of a series ofheating coils 36 suitably supported in a furnace 37. These coils are connected in a series by means of return 'bends h which extend through the wall. of

the furnace. Near the-bottom of the furnace is provided a perforated arch 37 for distributing the gas flame and protecting the lower heating coil. X fire chamber is pro- G-as is Preferably burned in the fire chamber and is supplied by a pipe 40 having a valve is and a burner is of any suitable kind in the fire chamber.

In order to secure satisfactory heating and circulation of treating liquid through the apparatus, the heater is'located so that the top thereof is below the bottom of the engine and extractor 1. v Tothe top of the heating coil is connected a return pipe 39 of the circulating system,

imam v f.. A check valve f is also placed in the lower end of pipe .at its connection with the coil. These check valves prevent back flow of water from'the engine. A water.

supply pipe 41, having a valve- Z connects with the mouthpiece or may connect atother desired part of the apparatus;I

, A second heating furnace 42, containing a gas heating coil 44 is provided for heating gas tobe used, if necessary, after the material has been treated with a solvent solution. A gas supply pipe 43, having a valve.

'n supplies a burner '0 in the furnace. gas supply pipe 45, leading from a gash'older 46, and having a valve 39' connects with the heating 'coil lt. Arpipe 47 leads from the coil into the lower part of the engine 1, and is provided with avalve g; An out et condenser 56 froin which-a pipe 57 leads to a rotary exhauster 58; The condenser is provided with a 'dra'W-ofi pipe and valve to. A pipe 59, having a valve rt leads fromthe exhauster and coiuiects with the pipe 47, connecting with pipe 45. 60, having a valve mconne'cts pipe 59 with the holder. Gas drawn from the engine and through pipe 47, beating engine.

With apipe 63 and with the extractor 'may thus be returned'either directly to the heating coil or to: the holder. Cold gas may also be' A compression pump 62 m'ayvbe' used to draw gas directly froin the holder 46 through pipe 66-, or hot gas from the heater through pipes 66, 66 and 4.-7, and discharge it through pipe and'branchvM in the top of an elevated feed tank 61, for-holding alkaline chemical or pipev66 has a valvec.

a valve z'c'onnects tank 61 oft e engine, The

A pipe 62, having A branch pipe 65, having a valve b- .connects mouthpiece '6? for admitting gasunder pressure directly to the beating engine when 'required for blow-- ing out the cellulcseor other contents.

To pipe 39,'leading from'tlre heating coil 36 is connecteda blow-ofl settling tank 51; To pipe 39 is also connected a draw-ofi pipe 53, which connects by a branch pipe and valve'fs' with a tank 54 and by asecond branch pipe and valve t with another tank 55. These tanks are provided respectivelywith faucets a and 2;.

in drying the pipe 50, having a valve 15, connects with the mouthpiece 6 and leads to a second A branch pipe passed from the holder having a valve 2', into the bleaching liquor. The

with pipe leadpipe 52, having a" valve 8 and connecting with. a storage and,

having a valve/2'1 for the escape ot- Across thelower end of tank '68, about one-., fourth of its height fromthe bottom, is secured a grid and filterlotlifi),providing a compartment '73 below torreceiving liquor,

7,4, havin a; valve cl, for discharging the liquor. pipe 7 5 connectes with the bottom of the tank and extends up into compartment 73 where its upper end is provided with a plu g 76,," and this pipe serves drained. I A gas pipe65 having a valve c, leads froma compression pump 62 and connects with tank 68 justiabove 'the'pulp discharging nozzle-1" for supplying gas under vapor at the time'thepulp is blown-against the target 69, so that; much of the black liquorpwhich would otherwise settle with up'and carried off with the gas. As a result of thisoperation there isleftless liquor to wash out ofgthe cellulose and, therefore, the cellulose will be inuch cleaner when removed from the-tank. The purge pipe 70 will pretcrably connect by. pipe 77having valve 7: with a condenser 78 for separating water or any other eondensablematter from the gas. e ga beretu'rned to the holder or to a heater,

By constructing the beating engine and extractor as shown in Fig, 1, I provide for effectively circulating the fiber material and solventgor-other treating liquor, and 'repeatedly subjecting them to the beating and grinding action of the drum and blades of the bed Iplate. Fpur parts or devices are provided for aiding circulation, consisting ofthe'Erevolvingdr'um 18, the inclinedscrewconveyer 12, in pipe 4,)the down-take pipe 5,'in' which the weight of material aids bygravity; andfthe injecting pipe 17 leading from pipe 39 and the force pump 35. These the drumis stopped the other parts would still act to circulate the treating ,liquor through the. fiber material for extracting ,tanhic and fatty acids, volatile oil, other oil, washing or bleaching liquid through vthe material. o By heatingwcod to a inoderate temperature. rangingbetween 215 and 24 5" F., deomnositionis set up, resulting .in the formation of a. number of acids of the fatty acid series and byraising the temperature there are formed other fatty acids The formation of fatty acids, among which acetic freedfromcondensable matter, will provided at the top, with a p'urge pipe 70 Vapors.

and to the bottom is connected a drain pipe for discharging the pulp after having been pressure tocar ry oft muchof the watery thepulp onto the filterfcloth, will be taken part-s work harmoniously together, and if 1 Q gums, res1ns, etc., orfor clrculating a atthe above and higher temperatures. Simultaneously with the;'format1on of these acids, carbonic ac1d,-"carbon1c oxrd' and methane are evolved from the wood, andthese bodies in a nascent state may act upon the acids so thatfthe latter may undergo decompcsition by more vigorous beating and a large number of products of 'decompo-' sition may be formed. Among, such. products are found 1nethyl alcol1ol (wood spirits), acetone and. metacetone, methyl acetic ether, aldehyde and dimethylacetal. I have discovered that these above men: tioned fatty acids, gasesand'other products of decomposition. when diffused in hot' water, are an excellent solvent for the cellular structure, the gummy and resinous rnateriaLfound in wood and plants, and that, if theJmixture' or "solution is circulated in contact with the-wood or plants to be treated the contained resinous matter, oils, and turpentine or other volatile .oil will be quickly liberated and may be drziwn off with circulating water. The turpentine and more .volatile oil will'pass ofi-in the form of vapor andwill be condensed, and therosin and gum will pass oil in a melted sermliquid condition, and will be deposited and recovered. I have also discovered that the fatty acids and other solvents may be most effectively and e cono'mically produced and diffused in water. by first heating fresh water and circulating it in contact with the of the treating liquor.

wood, orflplantsjto be treated at gradually increasing temperatures, ranging from 212 to approximately 300 F.- The volatile: sol-.

vent is readily extracted from .the wood or mixture is passed fifOlIibllB engineand extractor througha heater where the temperature is raised and is then; circulated up through the wood or plants, i-n"the engine audcxtractoin. The clrculation' of the water -and solvent, in contact .wlth the 'wood' or plants and through the heater','tlie temperature being graduallyincreased,is continued till the solvent has liberated the turpentine,

oil. resinous and gummy. matter, and these valuable products "have been recovered.

The treatment maybe continued for sixto twelve hours, according to; the character "of the wood or plants Tn the operation of preparing fatty acid I solvent from the wood orother fiber material, hot gas, such as wood-gas orproducer-gas heated to a temperature between 200 F. and 300 F; in the 'coil 44, may be admitted to theengine and extractor through pipe 4, and circulatedalone'or with .a suitand thetemperature of this circulating warm or hot gas for some tinie,-thirty to ninety 1ninutesin contact with the fiber material the fatty acids, gases and' other solvents will be extracted and formed from the wood and mixed with the water or other liquor. warm or hot gas is circulated, the volatile extract is preferably not drawn oif and con-- densed, but is retained in the circulating fluid for its solvent action on the cellular structure and on the gummy a'nd resinous At the .time the matter. The extraction of fatty acids and 1 (other solvents by gas is rapid and is quite g effective in connection with circulated water,

when conducted substantially as above described. V c

I preferably first remove tannic acid. from the wood or plant material, as it can be extracted at a low temperature, between 120 and 170 F.,- and if'left in the wood during the pulping operation, combines with the fiber, imparting thereto a dark color, and cannot then be washed out with water alone, but must be removed by alkali and bleachiug'agent-s, entailing additional expense.

In operating the apparatus, the engine and extractor 1, is partially filled with chips of wood or cut fibrous plant material through the mouthpiece 6*, at which time, the cover 7, and screen 10, will be removed. The screen plate 10, will be'attached to the flange of'pipe 9, so that the screen may be removedwith the cover. After the engine is suitably charged the cover will be secured admitted by pipe 41 and caused to rise to the level of the dischargepipe S, at its con- I motion with the expansion chamber 30. Gas plants and difinse'd in the water and the" may now be admitted to, and ignited at the pipe 17, for causing better circulation through the engine and extractor. The

water is circulated at aptemperature between:

f- .F. and 170 F. through the body of chips or plant material for .first removing tannic acid. Circulation of. water at this low 'temp'eratureis continued until all, or

most of thejtannic acid has been. extracted,

then this acid solution is drawn ofi'winto a tank 54, by opening the valve 8' in pi cs 53.

The system is 'again filled with water, or a fatty acid solvent solution made by a previous treatment of wood chips, and the pump 35 again pu't in motion, and the heat may be gradually increased in the furnace 37. As the circulating water becomes heated, approximately 1202129 F. some of withthe; water into .theheating coils. As the temperature of the Water is gradually increased other fatty acids, gases, and products ofdecomposition are formed and diffused through the water i The hot circulating water and the solvent fatty acids soon i commence to dissolve the cellular structure and-release turpentine, or volatile oil, and

gummy or resinous matter from the woodchips or plants. The turpentine and other volatile oil vapor passed with the water or liquor into chamber 8030 where the volatile vapors separate and fill the upper part of chamber 30, from which they pass ofi through pipes 31, to the condenser 32, where condensation is effected. At the same time the resin or gum which has been released from the yvood or plant material is passed with the water down past the separating dome 33,-a'nd the resin or gumis deposited in the lower part of chamber while the water passes up through thedome'33, and

thence by pipe 34, the pump 35 and pipe 35 into the bottom of the heating coils 36, and thence through pipe 39 into the bottom of theengine.

By circulating the hot water up' through the body of material in' the engine the res; incus or gummy matter is carried upward and. floated ofi with the water through pipe 8 into the expansion and depositing chain be1" 30'30.

The circulating hot water or solvent liquor agitates the body of chips or plant material and prevents packing, and continuously carries away the extracted material so as; to continuously bring fresh liquor intocontact with the chips, thereby eflectively exerting its solventaction on the cellular structure so as to release the gummy and resinous constituents. In the expansion and depositing chamber 30-430 the'liquor is partlally cooled and quieted, so that the rosin or gum becomes hardened and will readily settle to the bottom of chamber 30.

The'temperature of the water of liquor may be gradually raised in theheating coils to approximately 300v F., and it will become charged, with an increasing percentage of fatty acids, gases, etc, and these 'act with increasing energy to dissolve, release and extract the turpentine, oil, resinous and gummy matter from the material until it is substantially free from suchconstituents. The operation maybe continued for a period varying from 6 to 12 hours, according to the character; of the wood 'or plant being treated. -D1ir'in g the above described operation of extracting-constituents from the fiber ma terial the screw 1 conveyer 12,- .may be operatedto assist circulation and agitation of material in the engine. :The pump 35. will I also operate to force liquor through th'e heater and-thence through the injector pipe 17, thereby causing circulation thereof through the fiber material and up to the overflow pipe 88 leading from the mouthpiece to the expansion and depositing chamber 30-30.. v j a 'At suitable intervals,the valve 9 may be opened and the resinous or gummy matter discharged from the chamber 30 but this may be mostly discharged at the end of the operation. I

At any suitable stage in the operation, when the chip or plant material has become sufficiently softened and partially freed from gummy or resinous material the beating drum 18 may be set in motion and the material subjected to beating, rubbing and grinding while at the same time the hot solvent liquor is circulated through the engine. 7

When the treatment ofthe material in the engine is .completed, the valve 6 in pipe 8 may be closed and the blow off -valve .9

opened, permitting the water or l'iqnorcontaining the fatty acid to be blown off into the storage and settling tank 51, where it is reserved fpr treating a succeeding charge offiber materialin the engine and extractor. This blowing off operation may be facilitated by admitting compressed gas from pump (52 through pipe into the top'of the engine. The wood chips or other fibrous material in the treating enginewill now be practically free from'guin, resin, and oily matter, and the pores will be open so as to be readily permeated by causticsodaor other solution. r p

The cleaned fibrous material maybe conveniently reduced to cellulose directly in the engine, which now becomes a digester and beating engine, by adinitting fresh water through pipe 41 and the desired per cent. of caustic soda solution of sulfite of soda from tank 61. The heater drum 18,

and the circulating devices will be put into operation at the desired stage of the process', The circu1ating-pump35 will be put into operation and the liquor caused to circulate in the direction of the arrows through the heater 36 and upv through the material tilldigestionand reduction to pulp or cellulose is completed. The 'temperature may be raised to 250 F., or higher if required, and ,at intervals more alkaline solution admitted from tank 61. Gasunder pressure may be admitted by pipe 64' into or fiber material the percentageof caustlc ,soda, sulfite or soda or other chemical used,v for'digesti'ng the fibrous materiahwill the top of tank (il-forforcing-the" alkaline Y I solution into the'engine' Owing to'the preliminary thorough preparation of the chips,

be very muchsmaller that that required in the ordinary process. The heat andzpres- Sui-e will be much lower and the time will be much reduced for reducing the material to a good strong fibe'rpulp or cellulose.

The cellulose prepared as above described, freed from gums and resins, will be bleached to the desired extent with a comparatively v cellulose will have greater strength thanv that produced in the usual way.

After reduction of the fibrous material, by digestion with-alkali or alkaline salt, to pulp or cellulose, has been completed,;that 1s codked in the engine, I may draw off the alkaline liquor through pipe 3*, and admitfresh warm or cold water through pipe 41 to the digester and engine and circulate such water repeatedly through the cellulose bymeans of pump and conveyer 12 for washing out the alkali and dissolved or saponified oily or resinous matter. The first wash liquor may be drawn off and fresh water again admitted and circulated till the cellulose is sufliciently clean. The finished cellulosemay be blown off through pipe 3 to the disintegrating tank 68.

The cellulose having been produced, gas under pressure is supplied from pump 62 through pipe 65 to the top of the engine and then valve 1' is opened and the cellulose is discharged throughblow-ofl pipe 3 and nozzle Z" against the target 69 in the top of tank 68. Here the articles which adhere together will be disintegrated and separated. At the same time gas 'under pressure will be admitted through pipe 65,

just above the discharge nozzle 1, so as to catch the spra of liquor, containing colormg matter an some residue of gummy matter, and carry it out through the purge pipe 70.-. The top.va1ve 71 may be open, so as to .blow the gas and vapors into the open air, but said valve will preferably be closed and .the gas' and vapors conducted by pipe 77,

1 its Valvef' being open, to a condenser 78,

1 where the liquor vapor will be condensed, while the gas will be freed and returned to the holder,jor toa heater to be again heated and then compressed to'be used over.

I again for blowing ()lltfCOlOl'Gd liquor vapor. Any liquor which drains I from the pulp through the filter cloth- 72 will be draw'n jofi' from compartment 73 as required. The

i pulp or cellulose may be discharged from tank 68 by opening valve 76 in pipe 75, into a bleaching or other tank. I T

By first extracting and removing the tannic acid from the wood, I' prevent discoloration of the cellulose. The tannic acid is left in the treating tank combines with the fiber and becomes fixed so that it cannot be Having described my invention, what I claim, and desire to secure by Letters Patent- 1s 1. A closed heating engine and extractor having a drum 'and bed plate provided with blades and independent means including a screw conveyer and an injector inlet pipe for p and treating liquor.

2. A closed beating engine and extractor having a beating drum, a vertically adjustable bed plate and separate means includin causingcirculation of fiber material or pulp a screw conveyor and-a liquid injector fee pipe for causing circulation of fiber material and treating liquor.

3. A closed beatin engine and extractor .having a horizontal imdy provided with a beating drum and bed plate, an inclined pipe I or trunk above said body and drum and connecting' atone end with said body and having means for conveying material and cans ing circulation in the engine, a down take pipe connecting with the other end of the body and said inclined pipe connecting at its other end with the upper end of the downtake pipe.

4. A closedbeating engine and extractor having a horizontal body containing a heating drum and bed plate, an inclined pipe or trunk connecting at its lower end with the body, a down-take stand pipe connecting the elevated end of said inclined trunk with the body and a conveyor device in the inclined trunk for causing circulation of material and liquor in the engine.

5. A beating engine andextractor having a horizontal body containing a' beating drum and bed plate, an inclined pipe or trunk connecting at its lower end with one end of the body, a mouth piece having a feed opening and cover connecting with, its upper'end, a

down-take stand pipealso connecti-ngwith said upper end and with the other'end of the body, and means for-causing circulation of material, and liquor in' the engine and ex tractor.

6. A beating engine and extractor having a horizontal body containing a drum and bed plate, an inclined trunk connecting at its lower end with the body at the discharge side of the drum, a stand pipe connecting the upper end of the trunk with the body at ated end of said body and an injector inlet pipe,

the intake side of the drum, and a screwconveyer in said inclined trunk for causing circulation of material and treating liquor.

7. A beating engine and extractor having a horizontal body containing a drum and bed plate, an inclined trunk connecting at its lower" end with the body at-the discharge side of the drum, a stand pipe connecting the upper end of the trunk with the body at the intake side of the drum, a mouth piece having a feed opening and cover, a strainer and a discharge pipe mounted at the upper end of the stand pipe and trunk, and means for causing circulation of material and liquor.

8. A'beatin engine and extractor having a horizontal ody containinga drum and bed plate, an inclined trunk connecting at its lower end with the body at the discharge side of the drum, a stand-pipe connecting the upper end of the trunk with the body at the intake side of the drum, a mouth piece having a feed opening and cover, mounted above the stand pipe, a conveyer in the inclined trunk, and an injecting inlet pipe connecting with the body on the intake side of the drum for the purpose described.

9. A beating engine and extractor having a horizontal body containing a beating drum and bed plate, an inclined pipe or trunk con necting at its lower end with the body, a down-take stand pipe connecting the ele- .inclined trunk with the conveying fluid under pressure, connecting with a part of the engine and extractor for causing cir-,

culation therein.

' 10. A beating engine and extractor having a horizontal body containing a beating drum and bed plate, an inclined pipe or trunk connecting, at its lower end with the body, a down-take stand pipe connecting the elevated end of said inclined trunk with the body and an injector inlet pipe projecting into a part ofthe engine, and a sup ly pi p0 having "-ineans for forcing fluid under pressure through said injector for causing circulation in the engine and extractor.

11'. A closed beating engine and extractor having a horizontal body containing a beating drum and bed plate, an inclined circulating pipe or trunk connecting at its lower-end with the body, a down-take stand pipe connecting the elevated end of said in clined trunk with the body, a discharge pipe connecting with the'upper part of the engine, a heater connecting with said pipe, an injector inlet pipe connecting the body, a pipe leading from the heater and connecting with said injector pipe and means in the inclined pipe for causing circulation I of fluid through the heater and engine.-

12.'A closed beating engine and extractor with t e ends ofrthe body,

, jector inlet having a horizontal body containing. a beating drum and bed plate, an inclined circulating pipe or trunk having a conveyer connecting at its lower end with the body,

a down-take stand pipe connecting the elevated end of said inclinedtrunk with the body, a discharge pipe connecting with the upper part of the engine, a liquid injector pipe connecting with the body, aforcing device and a heater connecting with said discharge pipe and a return pipe connecting with said injector at the lower part of the engine for causing circulation through the heater and engine.

13. A closed beating engine and extractor having a horizontal body containing a beating drum and bed plate, an inclined circulating pipe or trunk connecting at its lower end with the body, a down-take stand pipe connecting the elevated end of said inclined trunk with the body, an injector inlet pipe connecting with a lower part of the engine, a liquor discharge pipe connecting with an upper part of the engine and extractor, a heater connecting with said pipe, a return pipe connecting the heater with said injector at the engine, and separate means foricausing circulation of treating liquor through the engine and heater.

14. A closed beating engine and extractor having a horizontal body containing a beating drum and bed plate, a circulating pipe or trunk above the body and drum and connecting at one end with one end of the body and at the other end with the other endof the body, and means in said trunk for causing circulation of material and liquor.

15. A closed beating engine and extractor having a horizontal body containing a beating drum and bed plate, a transverse pipe or trunk above and connecting at each end with the ends of the body, a conveyer in said trunk, and means for. feeding the engine with fiber npaterial and treating water or liquor.

16. A closed beating engine and extractor having a horizontal body containing a beat ing drum and bed plate, an upper transverse ipe or trunk connecting at each end a mouth piece, having a feed opening and cover, connecting-With the trunk, and a'oonveyer in the trunk for assisting circulation of material and liquor.

17. The combinationwith a closed beating engine and extractor, of means for sup plying hot water or liquor thereto, including an injector inlet pipe, a discharge pipe for liquid and vapor connectingv near the top of the engine, a heater and a return circulating pipe connecting with said inpipe for supplying liquor to the engine and assisting circulation therein.

'and with the disintegrating tank, a blow- *nozzle in said tank, the discharge end of \/Vitne'sses:

18. The combination with a closed beatacross the stream of discharged pulp or 10 ing engine and extractor, of a pulp receivcellulose. I ing and disintegrating tank; a gas com- In testimony whereof I afiix my signapression pump connecting with the engine ture in presence of two witnesses.

off pipe of the enginehaving a discharge BURDETT the gas pipe being adjacent to said noz- E. B, CLARK, .zle, whereby a blast of gas may be blown BENNETT S. 'JONES. 

